Small asteroid detected 4 days after passing as close as satellites

On March 15, astronomers detected an asteroid that had passed closest to Earth on March 11, sweeping in at about the distance of our geostationary satellites.

Astronomers see black hole raging red

Astronomers have observed violent red flashes, lasting just fractions of a second, during one of the brightest black hole outbursts in recent years.

Unexpected changes in Ceres’ bright spots

Astronomers using a telescope in Chile have seen unexpected daily changes on Ceres' famous bright spots, suggesting they change under the influence of sunlight.

What happens to its stuff when black hole vanishes?

A new theory lets scientists follow a black hole's life over time.

Incredible solar eclipse footage from flight

Spectacular video shows last week's total solar eclipse from a redirected Alaska Airlines flight. Wish we all could have been there!

Newest Mars mission on its way

Signals have been received from the ExoMars mission spacecraft, and the craft is in good health and on its way to Mars!

Close comet flyby plunged Mars’ magnetic field into chaos

Comet Siding Spring's close flyby of Mars in October 2014 blew away part of the planet's upper atmosphere, suggest MAVEN spacecraft observations.

See an aurora in real-time

Most videos of auroras are sped up. Enjoy the mesmerizing dance of an aurora in real time.

Lunar shadow moves across Earth

This is way cool. Watch the moon's shadow move across Earth during the March 9 total solar eclipse. A first ever animation from deep space.

See Earth in Mars’ night sky

If you were standing on Mars, you could see Earth and the moon as two bright evening or morning "stars." A Mars rover captured this image of Earth in Mars' sky.

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